While the details are scant, Crygil posted an update on the Wintergrasp situation.
Essentially all the realms are going to be restarted on off-peak hours, and the fix should then kick in.
He notes that they are going to be monitoring realm stability and Wintergrasp closely. That leads me to believe they are not supremely confident in the fix. I'll hope that I'm wrong here and that they're just saying that to look good. Ideally the fix will be great and work off the bat.